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MobiSys Tutorial, San Francisco
TinyOS Hardware
Joe Polastre,
Phil Levis, Rob Szewczyk, David CullerUniversity of California, Berkeley
Intel Research Berkeley
MobiSys Tutorial, San Francisco
Motes
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UC Berkeley Family of Motes
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Mica2 and Mica2Dot
• ATmega128 CPU– Self-programming
• Chipcon CC1000– FSK
– Manchester encoding
– Tunable frequency
• Lower power consumption
1 inch
MobiSys Tutorial, San Francisco
Wireless Robots
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COTS-BOTS (UCB)Commercial Off-The-Shelf roBOTS• 5” x 2.5” x 3” size
• <$250 total
• 2-axis accelerometer
MobiSys Tutorial, San Francisco
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Robomote (USC)• Less than 0.000047m3
• $150 each
• Platform to test algorithms for adaptive wireless networks with autonomous robots
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MICAbot (Notre Dame)
• Designed for large-scale research in distributed robotics and ad-hoc wireless networking.
• $300 each
MobiSys Tutorial, San Francisco
Sensorboards
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Basic Sensor Board
• Light (Photo)
• Temperature
• Prototyping space for new hardware designs
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Mica Interface Board
• 8 External Analog Inputs using Block Screw Terminals
– External Probes
• 8 channel digital I/O
• 1 relay driver
• On board 12-bit ADC– 0-2.5V, 0-3V, 0-5V
Ranges
• Stable 2.5V Reference
• 3V and 5V power
• Designed by UCLA CENS w/ Crossbow and UCB
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Mica Sensor Board
• Light (Photo)
• Temperature
• Acceleration– 2 axis
– Resolution: ±2mg
• Magnetometer– Resolution: 134G
• Microphone
• Tone Detector
• Sounder– 4.5kHz
MobiSys Tutorial, San Francisco
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PNI Magnetometer/Compass
• Resolution: 400 Gauss
• Three axis, under $15 in large quantities
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Ultrasonic Transceiver
• Used for ranging
• Up to 2.5m range
• 6cm accuracy
• Dedicated microprocessor
• 25kHz element
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Mica Weather Board
• Total Solar Radiation• Photosynthetically Active
Radiation– Resolution: 0.3A/W
• Relative Humidity– Accuracy: ±2%
• Barometric Pressure– Accuracy: ±1.5mbar
• Temperature– Accuracy: ±0.01oC
• Acceleration– 2 axis– Resolution: ±2mg
• Designed by UCB w/ Crossbow and UCLA
Revision 1.5
Revision 1.0
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Motor/Servo Board
• H Bridge
• Standard Motor Interface
• On-board microprocessor
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Connexus Interface
For More Information, See:Eric Paulos. “Connexus: An Evocative Interface” Workshop on “Ad hoc Communications and Collaboration in Ubiquitous Computing Environments” New Orleans, LA. Nov 2002.
• Interfaces a mote with:– Vibration Motors
– Super-bright LEDs
– Force Sensing
– Accelerometer
– Nitinol/Flexinol contractor“muscle wire”
– Peltier Junction
• Tool for HCI research using wireless devices
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In Manufacturing
• “Dot” sensorboards (1” diameter)– HoneyDot: Magnetometer
» Resolution: 134 Gauss
– Ultrasonic Transceiver
– Weather Station
MobiSys Tutorial, San Francisco
Enclosures
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Mica Environmental Enclosure
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Environmental Monitoring
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Mica2Dot
• Standard Enclosure– HDPE
– Sealed
• Power Supplies– Coin Cell
» 250mAh
» 1Ah
– Li-SO2 (1Ah)
– NiMH (3Ah)
– AA batteries